Commitments and Contingencies - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Right-of-use asset	$ 600,000		$ 600,000		$ 600,000
Current Headquarters
Lessee, Lease, Description [Line Items]
Minimum monthly rental expense			$ 4,000
Discount rate (as a percent)	12.00%		12.00%
Operating lease cost	$ 100,000	$ 100,000	$ 200,000	$ 300,000
Remaining lease term	1 year		1 year
Right-of-use asset	$ 600,000		$ 600,000
Operating lease liability	600,000		600,000
Remaining lease payments for remainder of fiscal year	100,000		100,000
Remaining lease payments for next year	100,000		100,000
Future Headquarters
Lessee, Lease, Description [Line Items]
Right-of-use asset	0		0
Operating lease liability	$ 0		0
Building | Current Headquarters
Lessee, Lease, Description [Line Items]
Minimum monthly rental expense			$ 24,100
Annual rent increase (as a percent)	3.00%		3.00%
Building | Future Headquarters
Lessee, Lease, Description [Line Items]
Minimum monthly rental expense			$ 600,000
Annual rent increase (as a percent)	3.00%		3.00%
Lease term	12 years		12 years